<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>
<body>
    <div id="app">
        <div>当前上映电影数：{{count}}</div>
        <button v-on:click="add">上映</button>
        <button @click="del">下映</button>
        <button v-on:click="addS(5)">批量上映</button>
    </div>
    <script>
        const vm = new Vue({
            el:'#app',
            data(){
                return {
                    count:0,
                }
            },
            methods:{
                add(){
                    this.count++
                },
                del(){
                    this.count--
                },
                addS(n){
                    this.count+=n
                }
            }
        })
    </script>
</body>
</html>